To the best of my knowledge, the only thing you have to do is remove the laptop from the case and place it in a bin by itself. Good idea to have the battery charged, in case you're asked to turn it on.

I believe the TSA has the right to search and/or confiscate laptops or other electronic devices. Never have had any issues to date--I've never even been asked to turn mine on!

Remember, the TSA is like Disney in many ways--they reserve the right to do many things that rarely are done.